Binding post



Feb. 28, 1928.

' 1,660,807 o. B. NORGREN BINDING POST Filed May 28, 1925 6MM! @Wbt Patented Feb. 2s, ieee.

OSCAR B. NORGREN; on CHICAGO, ILLINoIsassIGNoa 'ro ARTHUR LI. .scIIIfII'rTy 'or CHICAGO,

ILLINOIS.

BINDING POST.

.Application filed Mayas, 19.25. serial No. 38,370.

. scale;

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Fig. 3 is a similar elevation with the contact wire removed;

Fig. 4 is an elevation of the and Fig. 5 is a much enlarged transverse section.

The central stein or standard S is a bar of metal in which have been cut annular grooves 10 and 11 to leave a head 12, a collar 13 and a base 14. The lower end Iof the standard is drilled and tapped as shown in central stem;

dotted lines in Figs. 3 and l so'k that the device may be secured to a panel or other support 15 by lscrew 16 and washers 17 and "18. A permanent electrical connectionV is furnished at 19. Y

Mounted upon the upper end of the standard is a tubular cap 2O having its upper end closed, and having the edges of the kopen end turned in to form a lip as shown at 21,

Inside Vof the cap 20, and over the head 12,*is a spring 22v which actsto elevate the cap.

with respect to the standard. The inturned lip 21 engaging the lower edge of collar 13 limits this upward movement of the, cap, and also prevents the removal of the cap. The spring 22 permits the cap to be pressed downward with respect to the standard.

Cut in the side of the cap 2O is a transverse downwardly inclined slot 23 which eX- tends alittle less than half way thru. The

location of this slot is such that when theA n i `ing surfaces on the standard above and becap is in its elevated position, as shown in Fig. 3, the slot is closed by` the head 12. Vvlhen the cap is pushed down by hand, the slot may be moved to a position below the head 12, and a wire as W' may be inoved transversely into the slot and under the head 12. If the cap is now released, the spring` 22 will elevate the cap -20 and grip the wire between the lower edge of head 12 and the lower edge of slot 23, at the same time forcing the wire inward against that part of*V the standard S which is in the-'annular As thus secured, the wire W held firmly .electrical connection being made.

against the standard and makes electrical connection therewith. To insure perfection of electrical contact, .and also to hold the wire l/V more securely against withdrawal, I undercut the head as shown at 24 to produce a sharp edge which bites slightly into the wire under the elevating force of the spring 22.

The standard S is a lined post to which is connected a conductor 19.

rIhe cap 2O is a' mounted to reciprocate on the standard, being moved manually in one direction and by` the spring in the'other direction. The .cap is also freely rotatable on the standard so that the slot 23 may beV at any side of .the post and accommodate a wire comingA from any direction.

The spring 22 is entirely enclosed. It is also to be noted that the slot 23 is closed by the head 12 excepty when ya wire Wis being i inserted or'withdrawn. In normal position, as shown in Fig. 3, this closure is complete by the head.` When a wire is held, as in Figs. 1 and 2, the part which isnot closed by the head is closed by the wire itself. Ars

a consequence of this, dust and dirt are kept away from the contact making'parts ofthe post, and there is greater certainty of a good It is to. be observed that this binding post has all'of the conveniences of other` spring operated posts, but it has the added convenience of being accommodated to a wire coming from any horizontal direction. It also has the advantage ofl excluding dust from the operating parts, and its smooth eX- terior gives it afiiiishedappearance.

- That I claim is: y

1. In a binding post, a standard having an annular groove in its eXterior,`a longitudinally movable tubular cap having bearlow the groove, said cap being'vrotatable von V l a bearing surface on` the standard' but will permit the cap to be depressed so as to open the slot. l, f

2. In aA binding post, a standard secured in a fixed position to a support and having an annular groove removed a short distance from the upper end thereof, a cap of pressed .y

metal slidably rotatably mounted upon the standard andprovded with a slot in `Vits side, andy a spring enclosed by said cap,

` Said spring Serving to hold the Cap normally o at a poeition in Whih the slot Will be closed 5 by that part of the standard which above the groove. Y

Y3. In a'bindlng'post, a standard hav/ing,

an annular groove therein, said groove being undercut sor that the metal above the Y.

periphery, a cap Vslidably and rotatably mounted upon the standard and provided .With an inclined slot in *itsy vsnide, and va Spring enclosed by "said Capl anderving to force a 'Wire in Said slot against said sharpV 15 edge,

OSCAR e. voixzGREiv.V 

